| (19) |
 |
|
(11) |
EP 0 406 846 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
06.03.1991 Bulletin 1991/10 |
| (43) |
Date of publication A2: |
|
09.01.1991 Bulletin 1991/02 |
| (22) |
Date of filing: 04.07.1990 |
|
| (51) |
International Patent Classification (IPC)5: C02F 1/28 |
|
| (84) |
Designated Contracting States: |
|
AT BE CH DE DK ES FR GB GR IT LI LU NL SE |
| (30) |
Priority: |
05.07.1989 US 375488
|
| (71) |
Applicant: UNION CARBIDE CHEMICALS AND PLASTICS COMPANY, INC. |
|
Danbury
Connecticut 06817-0001 (US) |
|
| (72) |
Inventors: |
|
- Ananthapadmanabhan, Kavssery Parameswaran
New Windsor, N.Y. 12550 (US)
- Goddard, Errol Desmond
Haworth, N.J. 07641 (US)
|
| (74) |
Representative: Weinhold, Peter, Dr. et al |
|
Patentanwälte
Dr. Weinhold, Dannenberg,
Dr. Gudel, Schubert
Siegfriedstrasse 8
80803 München
80803 München (DE) |
|
| |
|
| (54) |
Environmentally safe method for the removal of residual polyethers from aqueous waste
streams |
(57) An environmentally safe method is provided for the removal and disposal of residual
water soluble polymers, particularly polyethers, from aqueous waste streams, wherein
a pretreated inert inorganic substrate is contacted with the waste stream and the
polymer contained therein adsorbed onto the substrate. Thereafter, the polymers are
removed from the substrate as CO₂ and water by combustion and the substrate subjected
to regenerative conditions for recycling.